Arcellx, Inc.
ACLXDelisted Apr 28, 2026- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001786205
Arcellx, Inc. was delisted on Apr 28, 2026; its insiders filed their last Form 4 on Apr 28, 2026; 240 institutions reported holding it in 13F filings for Q1 2026, worth $6.52B in total; Soros Fund Management was the only superinvestor holding it.
13F holders, Q4 2025
Institutional positions in Arcellx, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 218
- +11 vs. Q3 2025
- Shares held
- 66.6M
- +3.56M (+5.6%) vs. Q3 2025
- Total value
- $4.34B
- −$833.5M (−16.1%) vs. Q3 2025
- New holders
- 42
- 72 more added
- Sold out
- 31
- 70 more reduced
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ACLX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 2 | $3.43M |
| Q1 2026 | 240 | $6.52B |
| Q4 2025 | 218 | $4.34B |
| Q3 2025 | 209 | $5.18B |
| Q2 2025 | 203 | $4.01B |
| Q1 2025 | 198 | $4.04B |
| Q4 2024 | 211 | $4.54B |
| Q3 2024 | 186 | $4.13B |
| Q2 2024 | 167 | $2.77B |
| Q1 2024 | 183 | $3.27B |
| Q4 2023 | 156 | $2.59B |
| Q3 2023 | 136 | $1.71B |
| Q2 2023 | 138 | $1.52B |
| Q1 2023 | 117 | $1.40B |
| Q4 2022 | 125 | $1.30B |
| Q3 2022 | 74 | $781.8M |
| Q2 2022 | 68 | $621.5M |
| Q1 2022 | 49 | $357.9M |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Arcellx, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| SEI Investments Co | 15,668 | $1.02M | 0.00% | +12,773+441.2% | Added |
| Intech Investment Management LLC | 15,031 | $980.0K | 0.01% | +2,776+22.7% | Added |
| Trexquant Investment LP | 14,915 | $972.5K | 0.01% | +14,915 | New |
| Jasper Ridge Partners, L.P. | 13,947 | $909.3K | 0.02% | −1,160−7.7% | Reduced |
| Handelsbanken Fonder AB | 13,000 | $848.0K | 0.00% | +1,400+12.1% | Added |
| HighTower Advisors, LLC | 12,558 | $818.8K | 0.00% | −20.0% | Reduced |
| SG Americas Securities, LLC | 12,041 | $785.0K | 0.00% | +3,926+48.4% | Added |
| New York State Common Retirement Fund | 11,623 | $757.8K | 0.00% | −8,722−42.9% | Reduced |
| Shay Capital LLC | 11,400 | $743.3K | 0.12% | +11,400 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 11,117 | $724.8K | 0.00% | 00.0% | Unchanged |
| State Board of Administration of Florida Retirement System | 10,850 | $707.4K | 0.00% | 00.0% | Unchanged |
| Martingale Asset Management L P | 10,618 | $692.3K | 0.02% | +103+1.0% | Added |
| Franklin Resources Inc | 10,131 | $660.5K | 0.00% | −3,194−24.0% | Reduced |
| Gotham Asset Management, LLC | 9,842 | $641.7K | 0.00% | 00.0% | Unchanged |
| LPL Financial LLC | 9,622 | $627.4K | 0.00% | −399−4.0% | Reduced |
| State of New Jersey Common Pension Fund D | 9,465 | $617.1K | 0.00% | +9,465 | New |
| China Universal Asset Management Co., Ltd. | 9,422 | $614.3K | 0.05% | −299−3.1% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 9,074 | $591.6K | 0.00% | −570−5.9% | Reduced |
| Dimensional Fund Advisors LP | 8,903 | $580.5K | 0.00% | −74,621−89.3% | Reduced |
| Millennium Management LLC | 8,821 | $575.1K | 0.00% | −31,520−78.1% | Reduced |
| ProShare Advisors LLC | 8,818 | $574.9K | 0.00% | +987+12.6% | Added |
| Guggenheim Capital LLC | 8,538 | $556.7K | 0.00% | +366+4.5% | Added |
| Marshall Wace, LLP | 8,442 | $550.4K | 0.00% | +8,442 | New |
| PSP Research LLC | 8,224 | $536.2K | 0.47% | +8,224 | New |
| High Net Worth Advisory Group LLC | 8,000 | $521.6K | 0.12% | 00.0% | Unchanged |
| AQR Capital Management LLC | 7,960 | $519.0K | 0.00% | −23,755−74.9% | Reduced |
| Aspiriant, LLC | 7,910 | $515.7K | 0.01% | +7,910 | New |
| Arizona State Retirement System | 7,613 | $496.4K | 0.00% | −509−6.3% | Reduced |
| Headlands Technologies LLC | 7,320 | $477.3K | 0.04% | +7,320 | New |
| Creative Planning | 7,319 | $477.2K | 0.00% | −2,843−28.0% | Reduced |
| Susquehanna International Group, LLP | 7,258 | $473.2K | 0.00% | −86−1.2% | Reduced |
| Twinbeech Capital LP | 6,949 | $453.1K | 0.03% | +6,949 | New |
| Allianz Asset Management GmbH | 6,200 | $404.2K | 0.00% | −700−10.1% | Reduced |
| KLP Kapitalforvaltning AS | 5,900 | $384.7K | 0.00% | +400+7.3% | Added |
| Banque Pictet & Cie SA | 5,109 | $333.1K | 0.00% | +5,109 | New |
| Advisors Asset Management, Inc. | 4,670 | $304.5K | 0.01% | −3,405−42.2% | Reduced |
| Marks Group Wealth Management, Inc | 4,524 | $295.0K | 0.03% | +4,524 | New |
| Teacher Retirement System of Texas | 4,144 | $270.2K | 0.00% | −2,653−39.0% | Reduced |
| Mercer Global Advisors Inc | 4,107 | $267.8K | 0.00% | +655+19.0% | Added |
| Farallon Capital Management, L.L.C. | 4,000 | $260.8K | 0.00% | 00.0% | Unchanged |
| Virginia Retirement Systems Et Al | 4,000 | $260.8K | 0.00% | +900+29.0% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 3,952 | $257.7K | 0.00% | −96−2.4% | Reduced |
| Quantinno Capital Management LP | 3,871 | $252.4K | 0.00% | +3,871 | New |
| Quest Partners LLC | 3,796 | $247.5K | 0.01% | +3,556+1,481.7% | Added |
| Harbour Capital Advisors, LLC | 3,825 | $242.3K | 0.05% | +3,825 | New |
| Virtus Investment Advisers, Inc. | 3,701 | $241.3K | 0.07% | +1,990+116.3% | Added |
| BNP Paribas Arbitrage, SA | 3,605 | $235.0K | 0.00% | −65,228−94.8% | Reduced |
| JustInvest LLC | 3,526 | $229.9K | 0.00% | −279−7.3% | Reduced |
| SBI Securities Co., Ltd. | 3,516 | $229.2K | 0.01% | +154+4.6% | Added |
| Simplex Trading, LLC | 3,414 | $222.6K | 0.01% | +3,414 | New |
| Man Group plc | 3,322 | $216.6K | 0.00% | +3,322 | New |
| Advisory Alpha, LLC | 3,313 | $216.0K | 0.01% | +313+10.4% | Added |
| Public Employees Retirement Association of Colorado | 3,217 | $210.0K | 0.00% | 00.0% | Unchanged |
| Mariner, LLC | 3,113 | $205.8K | 0.00% | −4,202−57.4% | Reduced |
| Ameritas Investment Partners, Inc. | 2,861 | $186.5K | 0.01% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 2,810 | $183.2K | 0.00% | +666+31.1% | Added |
| Avanza Fonder AB | 2,003 | $130.6K | 0.00% | +784+64.3% | Added |
| Group One Trading, L.P. | 1,969 | $128.4K | 0.00% | +1,388+238.9% | Added |
| Caption Management, LLC | 1,825 | $119.0K | 0.01% | −10,775−85.5% | Reduced |
| GF Fund Management Co. Ltd. | 1,136 | $74.1K | 0.00% | −57−4.8% | Reduced |
| Amalgamated Bank | 1,076 | $70.0K | 0.00% | −33−3.0% | Reduced |
| KBC Group NV | 1,056 | $69.0K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 1,010 | $66.0K | 0.00% | −61,888−98.4% | Reduced |
| Jones Financial Companies LLLP | 967 | $63.0K | 0.00% | +967 | New |
| US Bancorp | 948 | $61.8K | 0.00% | −849−47.2% | Reduced |
| Federated Hermes, Inc. | 697 | $45.4K | 0.00% | +133+23.6% | Added |
| State of Wyoming | 537 | $35.0K | 0.00% | +102+23.4% | Added |
| Ramirez Asset Management, Inc. | 500 | $32.6K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 429 | $28.0K | 0.00% | −96−18.3% | Reduced |
| Tower Research Capital LLC (TRC) | 427 | $27.8K | 0.00% | −569−57.1% | Reduced |
| The PNC Financial Services Group, Inc. | 425 | $27.7K | 0.00% | −35−7.6% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 366 | $24.0K | 0.00% | +104+39.7% | Added |
| GAMMA Investing LLC | 334 | $21.8K | 0.00% | −36−9.7% | Reduced |
| Smartleaf Asset Management LLC | 317 | $20.2K | 0.00% | +241+317.1% | Added |
| Versant Capital Management, Inc | 243 | $15.8K | 0.00% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 176 | $15.4K | 0.00% | +176 | New |
| Covestor Ltd | 225 | $15.0K | 0.01% | −164−42.2% | Reduced |
| Sterling Capital Management LLC | 229 | $14.9K | 0.00% | +146+175.9% | Added |
| Keating Financial Advisory Services, Inc. | 210 | $13.7K | 0.00% | +210 | New |
| CWM, LLC | 201 | $13.0K | 0.00% | −144−41.7% | Reduced |
| Kemnay Advisory Services Inc. | 179 | $11.7K | 0.00% | +179 | New |
| Daiwa Securities Group Inc. | 174 | $11.0K | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Planning Services, Inc. | 160 | $10.4K | 0.00% | +160 | New |
| SRS Capital Advisors, Inc. | 151 | $9.85K | 0.00% | +42+38.5% | Added |
| EverSource Wealth Advisors, LLC | 110 | $7.17K | 0.00% | −36−24.7% | Reduced |
| Rockefeller Capital Management L.P. | 97 | $6.32K | 0.00% | +89+1,112.5% | Added |
| Advisor Group Holdings, Inc. | 94 | $6.13K | 0.00% | −3−3.1% | Reduced |
| Larson Financial Group LLC | 79 | $5.15K | 0.00% | −7−8.1% | Reduced |
| Comerica Bank | 61 | $3.98K | 0.00% | +2+3.4% | Added |
| Parallel Advisors, LLC | 55 | $3.59K | 0.00% | 00.0% | Unchanged |
| Assetmark, Inc | 50 | $3.26K | 0.00% | +37+284.6% | Added |
| Aventura Private Wealth, LLC | 45 | $2.93K | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 44 | $2.87K | 0.00% | −214−82.9% | Reduced |
| Rothschild Investment LLC | 40 | $2.61K | 0.00% | −15−27.3% | Reduced |
| Signaturefd, LLC | 36 | $2.35K | 0.00% | +10+38.5% | Added |
| Huntington National Bank | 32 | $2.09K | 0.00% | 00.0% | Unchanged |
| Bessemer Group Inc | 30 | $2.00K | 0.00% | 00.0% | Unchanged |
| Parkside Financial Bank & Trust | 29 | $1.89K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 27 | $1.76K | 0.00% | −38−58.5% | Reduced |
| Fortitude Family Office, LLC | 26 | $1.70K | 0.00% | 00.0% | Unchanged |